PLATE XIV. 



Pectuncclus (continued). 



FIGS. 



1 — 7. P. sublasvis, Sow. Greensand, Blackdown. (P. 67.) 



1 a — e. "Wiltshire Collection, Woodwardian Museum. Right valve. 



2 a, b. Walton Collection, Woodwardian Museum. Right valve. 



3. Wiltshire Collection, Woodwardian Museum. Right valve, a, interior ; b, dorsal ; 



c, exterior x 2 ; d, ornament of same x 5. 



4. Same Collection. Young form, a, left valve ; b, same x 2 ; c, dorsal outline. 



5. Same Collection, a, b, right valve; c, dorsal outline. 



6. 7. Museum of Practical G-eology, No. 6573. Left valves. 



I — 12. P. umbonatus (Sow.). Greensand, Blackdown. (P. 69.) 



8. Wiltshire Collection, Woodwardian Museum, a, right valve ; b, outline of interior 



of same ; c, dorsal outline. 



9. Walton Collection, Woodwardian Museum. a, left valve x 1£ ; i, dorsal x H ; 



c, ornamentation x 5. 



10. Same Collection. «, left valve ; b, interior ; c, dorsal. 



11. Wiltshire Collection, Woodwardian Museum. Right valve. 



12. Museum of Practical Geology, No. 6572. Right valve. 



13. P. enghjphus, Woods. Chalk Marl (Bed ii), Dunscombe. Collection of 

 C. J. A. Meyer. (P. 71.) 



13. a, right valve, outline ; b, dorsal outline of same ; c, ornamentation on anterior 



part of shell x 4 ; d, ornamentation on posterior part of shell x 4 ; e, same 

 valve x 2. 



